# CVE-2026-102289: zizmor: Debug logging prints available GitHub credentials in cleartext

Status: published. Published: 2026-11-09. Updated: 2026-11-09.

zizmor is a static analysis tool for CI/CD systems. In version 1.27.0, debug logging serializes the parsed application configuration with a derived Debug implementation for GitHubToken, causing credentials supplied through GH_TOKEN, GITHUB_TOKEN, ZIZMOR_GITHUB_TOKEN, --gh-token, --github-token, or --zizmor-github-token to be written to stderr in cleartext. A single -v or --verbose option or an applicable RUST_LOG directive enables the affected logging during normal online operation and --no-online-audits, while explicit --offline clears the token first. If another party can read a CI log, support artifact, terminal capture, or public bug report containing the output, the party can use the credential according to its scopes, repository access, and lifetime. This vulnerability is fixed in 1.28.0.

## Remediation

- fix: zizmor (PyPI): OSV reports a fixed version 1.28.0. Check the advisory for supported release branches. (source: OSV GHSA-f42p-wjw5-97qh) — https://github.com/advisories/GHSA-f42p-wjw5-97qh

## Affected products and versions

- zizmorcore / zizmor: = 1.27.0 (affected). Source: CNA: GitHub_M
-  / zizmor (zizmor): 1.27.0 (affected, PyPI); Ecosystem version events: introduced 1.27.0; fixed 1.28.0. Source: OSV GHSA-f42p-wjw5-97qh

## Severity and prioritization

- CVSS 4.0: 7 (high); CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-532

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/zizmorcore/zizmor/security/advisories/GHSA-f42p-wjw5-97qh (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/zizmorcore/zizmor/pull/2213 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/zizmorcore/zizmor/pull/2215 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/zizmorcore/zizmor/commit/0731e01706af273be860d3d221e4d122e6741b6f (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/zizmorcore/zizmor/commit/724d0e86f4c073c3dc64507fb6c39bc20e46a48f (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/zizmorcore/zizmor/releases/tag/v1.28.0 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/advisories/GHSA-f42p-wjw5-97qh (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-f42p-wjw5-97qh (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-102289; retrieved 2026-11-09; source updated 2026-11-09

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-f42p-wjw5-97qh; retrieved 2026-11-09; source updated 2026-11-09

Revision: 50d11988c70e7918e5f3fcd95a44f34d0c77ea54085d5fb5010069557012e593

Canonical: https://y2.dev/cve/CVE-2026-102289

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